Setback Storey and Full Storey

Figure 3. Building with setback storey
Figure 3. Building with setback storey
Figure 4. Precipitation surfaces and drainage
Figure 4. Precipitation surfaces and drainage

LORO offers innovative solutions for draining setback storeys and cascades.

Outdoor Area Drainage

There is a tendency towards urban living with the feeling of living "in the green". This is made possible by an outdoor living area, which requires outdoor area drainage. This includes at least a balcony or a loggia; better yet, a large terrace as a roof terrace.

Apartments with so-called outdoor living areas are now in demand in almost every new construction or renovation project. People value the ability to step directly from the apartment - and as barrier-free as possible - onto the outdoor area, to enjoy fresh air and sunshine, and to sit under the open sky. Outdoor living areas include balconies, loggias and terraces of a building.

A roof terrace is a terrace that is not on the ground (Terra = earth), but above a living space, for which moisture protection, thermal insulation and sound insulation are of crucial importance.

Building Extension

The extension of a building is referred to as a setback storey, for example according to the building regulations of Schleswig-Holstein, when at least one external wall recedes by ≥ 2/3 of the height of the setback storey (Figure 3) and the floor area of the setback storey is < 3/4 of the floor area of the full storey below.

The building with a setback storey in the example has a roof and a roof terrace. An apartment in a setback storey with a surrounding roof terrace is also called a penthouse or Attikawohnung (Switzerland).

Roof and Roof Terrace

The building with an extended setback storey in the example has a roof on the setback storey and a roof terrace on the full storey below. The setback storey building in the example has a large roof of 150 m² and a large roof terrace of 100 m² (Figure 4).

The setback storey drainage must therefore have efficient drainage for both the roof on the setback storey and the roof terrace on the full storey. Large areas of roof and roof terrace require efficient and effective drainage with high flow rates from the surfaces.

Roof Drainage Not onto the Roof Terrace

With optimal roof drainage, the drainage of the setback storey roof does not discharge onto the roof terrace - neither the main drainage nor the emergency drainage.

Safe and rapid drainage of the roof and roof terrace for both main drainage and emergency drainage is of decisive importance for the roof drainage system.